Grate and grate-bar



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F. P. LANDIS.

GRATE AND GRATB BAR.

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lllivrrnn STATES FRANK F. LANDIS, OF VAYNESBOROUGH, PENNSYLVANIA.

eRATE AND GRATEMBAR.

SPECIFCATIQN forming part of Letters Patent No. 341,924, dated May 18, 1886.

Application filed February 23, 1886. Serial No. 192,836. (Nomodcl.)

To @ZZ whom t may concern:

Be it known that I, FRANK F. LANDIs, a citizen of the United States, residing at Vaynesborough, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Grates and GrateBars, of which the following is a specification, reference-being had therein to the accompanying drawings.

My invention relates to improvements in grates and grate-bars having the airopenings wider at the front than at the rear; and the objects of my improvements are to provide grate and gratc-bars having this characteristie with' a solid or closed portion at the rear and transverse zigzag,angular,or curved bars connecting the sides of each grate-bar, and to provide the outer grate-bars iorming the grate with loosely-iitting L shaped bars to permit lateral expansion of the grate, but retain ashes againstits sides to close the interstices between it and its snpportingframe or the side of the fire-box. I attain these object-s by the construction illustrated in the accompanying drawings, in Which Figure l represents in top View, end view, and longitlidinal vertical section a grate-bar constructed in accordance with my invention. Fig. 2 is a top view of a modification of said gratevbar. Fig. 3 is a transverse vertical sec- 'tion through the side of a iire-box having a grate-bar and side bar constructed in accordance with my invention.

A represents thelongitudinal side bars, and A the transverse bars uniting them to form a narrow grate, A2, and a series of them may be placed side by side to form the entire grate of rIhe longitudinal sidesA have pendent ribs A extending the whole length thereof to strengthen them. The transverse bars A are either of zigzag, angular, or of curved form, to permit them to slightly bend Vwhile highly heated or expanded without spreading the sides A apart. The spaces B between these transverse bars are wider at the front or adjoining the fire-door than the body of said transverse bars; but said spaces gradually diminish in size until at a distance toward ,the rear end equal to about one-third or onefourth of the length of the grate these spaces B are much less in width than the body of the transvere bars, and these spaces or openings stop altogether, and a solid surface, A4, remains adjoining the bridge or back part of the grate,upon which the fuel can be banked, and very little loss of combustible ensues.

To prevent air from passing between the side ot' the grat-chars and the side walls, E, of the fire-box without fitting them tightly against said walls, and therefore making allowance for the lateral expansion of the gratebars, filling-bars D are used. They are provided with a horizontal flange, d, near the l iottom,which extends nearly to the side walls ofthe fire-box, and forms a shelf, upon which cinders and ashes C will collect and render that part of the grate substantially airtight. The upper edge ofthe filling-bar D ispreferably provided with a lateral lip, d', extending its whole length, to bear upon the adjoining grate-bar and prevent sagging of said bar D. rIhe ends ofthe grate-bars rest, as usual, upon end bars, F, secured by rivets f, or otherwise, to the walls of the iire-boX.

Having now fully described my invention, I claim l. A grate consisting of a series of grate-l bars, each having longitudinal side bars, A, and curved transverse bars A integral therewith, and spaces B between the latter, wider at the front end than at the rear end of said grate, substantially as and for the purpose described.

2. A grate consisting of a series of grate bars, each having longitudinal side bars, A, and zigzag transverse bars A integral therewith, and spaces B between the latter, wider at the front end than at the rear end, and at said rear end a closed solid surface, A, substan-tial] y as and for the purpose described.

3. In combination with the walls of a firebox and the grate-bars thereof, the iilling-bars D, provided with a horizontal flange, d, and fitting loosely between said walls and gratebars, substantially as and for the purpose described.

In testimony whereof I afX my signature in presence of two witnesses.

' FRANK F. LANDIS.

llitncsses:

DAVID W. Gooi),

ALF. N. RUSSELL. 

